Sheet Metal Stamping & Press Lines worked example

Lubricant Usage at 61% roll and spray transfer efficiency to strip: a worked example

Suppose roll and spray transfer efficiency to strip falls to 61%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Lubricant Usage tells a stamping line how much drawing compound it actually has to buy and load to keep a given amount of coil coated, once real roll-coater or spray transfer losses are accounted for.

The inputs for this scenario

  • Coil or blank surface area covered per shift: 500 units (held at the documented default)
  • Lubricant applied per unit of surface: 0.08 units (held at the documented default)
  • Roll/spray transfer efficiency to strip: 61 % (the input this scenario stresses; the baseline uses 85)

Working through the calculation

  • The calculation starts from the formula this tool documents: Required lubricant usage = covered amount × use per unit ÷ transfer efficiency.
  • Required quantity works out to 65.57 units at these inputs, and this is the headline figure for the scenario.
  • Theoretical amount works out to 40 units at these inputs.
  • Loss allowance works out to 25.57 units at these inputs.
  • Efficiency works out to 61 % at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where roll and spray transfer efficiency to strip sits at 85% and the headline result is 47.06 units, this scenario comes in 39.34% above the baseline at 65.57 units.
  • It computes the gross lubricant quantity you must dispense so that after transfer losses the strip receives the theoretical amount needed for the covered surface. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Required quantity: 65.57 units (headline result)
  • Theoretical amount: 40 units
  • Loss allowance: 25.57 units
  • Efficiency: 61 %

Run it with your numbers

  • To rerun this with your own numbers, open the live Lubricant Usage calculator, set roll and spray transfer efficiency to strip to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.